feat: add suffix to rsc txt files for easy routing

* enables easy handling for cdns or proxies to identify rsc payloads and route them correctly beside other txt files

Author: stefan-schubert-sbb

packages/next/src/client/components/router-reducer/fetch-server-response.ts

@@ -180,9 +180,9 @@ export async function fetchServerResponse(
         // to the request.
         url = new URL(url)
         if (url.pathname.endsWith('/')) {
-          url.pathname += 'index.txt'
+          url.pathname += 'index.rsc.txt'
         } else {
-          url.pathname += '.txt'
+          url.pathname += '.rsc.txt'
         }
       }
     }

packages/next/src/client/route-params.ts

@@ -154,11 +154,11 @@ export function urlToUrlWithoutFlightMarker(url: URL): URL {
   if (process.env.NODE_ENV === 'production') {
     if (
       process.env.__NEXT_CONFIG_OUTPUT === 'export' &&
-      urlWithoutFlightParameters.pathname.endsWith('.txt')
+      urlWithoutFlightParameters.pathname.endsWith('.rsc.txt')
     ) {
       const { pathname } = urlWithoutFlightParameters
-      const length = pathname.endsWith('/index.txt') ? 10 : 4
-      // Slice off `/index.txt` or `.txt` from the end of the pathname
+      const length = pathname.endsWith('/index.rsc.txt') ? 14 : 8
+      // Slice off `/index.rsc.txt` or `.rsc.txt` from the end of the pathname
       urlWithoutFlightParameters.pathname = pathname.slice(0, -length)
     }
   }

packages/next/src/export/index.ts

@@ -846,7 +846,7 @@ async function exportAppImpl(
               outDir,
               `${route}${
                 subFolders && route !== '/index' ? `${sep}index` : ''
-              }.txt`
+              }.rsc.txt`
             )
           : join(pagesDataDir, `${route}.json`)
 

test/integration/app-dir-export/test/utils.ts

@@ -65,17 +65,17 @@ export const expectedWhenTrailingSlashTrue = [
   'another/first/__next.another.$d$slug.txt',
   'another/first/__next.another.txt',
   'another/first/index.html',
-  'another/first/index.txt',
+  'another/first/index.rsc.txt',
   'another/index.html',
-  'another/index.txt',
+  'another/index.rsc.txt',
   'another/second/__next._full.txt',
   'another/second/__next._index.txt',
   'another/second/__next._tree.txt',
   'another/second/__next.another.$d$slug.__PAGE__.txt',
   'another/second/__next.another.$d$slug.txt',
   'another/second/__next.another.txt',
   'another/second/index.html',
-  'another/second/index.txt',
+  'another/second/index.rsc.txt',
   'api/json',
   'api/txt',
   'client/__next._full.txt',
@@ -84,17 +84,17 @@ export const expectedWhenTrailingSlashTrue = [
   'client/__next.client.__PAGE__.txt',
   'client/__next.client.txt',
   'client/index.html',
-  'client/index.txt',
+  'client/index.rsc.txt',
   'favicon.ico',
   'image-import/__next._full.txt',
   'image-import/__next._index.txt',
   'image-import/__next._tree.txt',
   'image-import/__next.image-import.__PAGE__.txt',
   'image-import/__next.image-import.txt',
   'image-import/index.html',
-  'image-import/index.txt',
+  'image-import/index.rsc.txt',
   'index.html',
-  'index.txt',
+  'index.rsc.txt',
   'robots.txt',
 ]
 
@@ -122,22 +122,22 @@ const expectedWhenTrailingSlashFalse = [
   '_not-found/__next._not-found.txt',
   '_not-found/__next._tree.txt',
   'another.html',
-  'another.txt',
+  'another.rsc.txt',
   'another/__next._full.txt',
   'another/__next._index.txt',
   'another/__next._tree.txt',
   'another/__next.another.__PAGE__.txt',
   'another/__next.another.txt',
   'another/first.html',
-  'another/first.txt',
+  'another/first.rsc.txt',
   'another/first/__next._full.txt',
   'another/first/__next._index.txt',
   'another/first/__next._tree.txt',
   'another/first/__next.another.$d$slug.__PAGE__.txt',
   'another/first/__next.another.$d$slug.txt',
   'another/first/__next.another.txt',
   'another/second.html',
-  'another/second.txt',
+  'another/second.rsc.txt',
   'another/second/__next._full.txt',
   'another/second/__next._index.txt',
   'another/second/__next._tree.txt',
@@ -147,22 +147,22 @@ const expectedWhenTrailingSlashFalse = [
   'api/json',
   'api/txt',
   'client.html',
-  'client.txt',
+  'client.rsc.txt',
   'client/__next._full.txt',
   'client/__next._index.txt',
   'client/__next._tree.txt',
   'client/__next.client.__PAGE__.txt',
   'client/__next.client.txt',
   'favicon.ico',
   'image-import.html',
-  'image-import.txt',
+  'image-import.rsc.txt',
   'image-import/__next._full.txt',
   'image-import/__next._index.txt',
   'image-import/__next._tree.txt',
   'image-import/__next.image-import.__PAGE__.txt',
   'image-import/__next.image-import.txt',
   'index.html',
-  'index.txt',
+  'index.rsc.txt',
   'robots.txt',
 ]